1956 AHSME Problems/Problem 30

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Solution

Drawing the altitude, we see that is opposite the $60^{\circ}$ angle in a $30-60-90$ triangle. Thus, we find that the shortest leg of that triangle is $\sqrt{\frac{6}{3}} = \sqrt{2}$, and the side of the equilateral triangle is then $2\sqrt{2}$. Thus, the area is

\[\frac{ (2\sqrt 2)^2 \cdot \sqrt{3}}{4} = \frac{8 \sqrt 3}{4} = 2 \sqrt 3}\] (Error compiling LaTeX. Unknown error_msg)

$\boxed{B}$

~JustinLee2017